package com.foreknow.demo10;

/**
 * == 两个字符串对象 比较的是内存地址
 * 如果想比较两个字符串的内容是否相同使用equals
 */
public class Demo {
    public static void main(String[] args) {
        String s1 = "haha";
        String s2 = "haha";
        String s3 = new String("haha");
        String s4 = new String("haha");
        Integer i1 = new Integer(20);
        Integer i2 = new Integer(20);

        System.out.println(s1 == s2);
        System.out.println(s1 == s3);
        System.out.println(s3 == s4);
        System.out.println(i1 == i2);
    }
}
